#include"mymath.h"

int add(int x,int y)
{ 
    return x+y; 

}

int sub(int x,int y)
{
    return x-y;
}


int mul(int x,int y)
{
    return x*y;
}

int dev(int x,int y)
{
   if(y == 0)
    {
      //myerrno=-1;
      return -1;
    }
   return x/y;
} 

	
